<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function Members(name,age,sex){
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
        Members.prototype.sayname = function(){
            console.log(this.name)
        }
        var dai = new Members("dai",18,"female")
        console.log(dai);
        dai.sayname();
        var liao = new Members("liao",19,"female")
    </script>
</body>
</html>